[Test-Equipment] Help with HP 70000 Spectrum Analyzer

[James M. Walker]

Hey Greg did you get a copy of the service manual?
If NOT I can email you the thing.

Some of the problems stated in the manual, are the unit ac input selector
is set at a different value than you are using, Ie; unit set for 230 VAC 
with 115 VAC
applied, or the reverse! Also if the unit is a 400 HZ as opposed to 60 HZ 
model.
You may get fault indications.

Input, need more input!

Jim
WB2FCN

----- Original Message ----- 
From: "Greg Werstiuk" <greg_werstiuk at msn.com>
To: "'Discussion of Electronic Test Equipment'" 
<test-equipment at mailman.qth.net>
Sent: Friday, May 23, 2008 2:45 AM
Subject: RE: [Test-Equipment] Help with HP 70000 Spectrum Analyzer


> Would it be correct for those of reading your post to assume you have
> removed all of the plug-ins and the over current condition still exists at
> this point?
>
> -
> Greg
>
>> -----Original Message-----
>> From: test-equipment-bounces at mailman.qth.net
>> [mailto:test-equipment-bounces at mailman.qth.net] On Behalf Of
>> Chris Hackworth
>> Sent: Thursday, May 22, 2008 8:27 AM
>> To: Test-Equipment at mailman.qth.net
>> Subject: [Test-Equipment] Help with HP 70000 Spectrum Analyzer
>>
>> Greetings all,
>>
>>   I have come into the possession of a HP 70000 Spectrum
>> Analyzer, consisting of the 70004A display, 70902A IF module,
>> 70900B Controller,  a 70001A mainframe with the 70310A
>> Precision Oscillator, 70600A preselector, all connecting
>> cables, manuals and 70905B Rf section (50Khz to 22 Ghz). I
>> got it for the princely sum of nothing, just haul it off the
>> company property because it was broken. The power supply in
>> the 70001A mainframe is showing an over current fault. I
>> checked the trip level of this alarm and it is set correctly.
>> Anyone else have a problem like this? Nothing on the power
>> supply card looks burnt or overheated, so I am thinking there
>> is a bad semiconductor somewhere on the board. The HP manual
>> reccomends replacing the power supply, but there is no way
>> that is going to happen.
>>
>> Thanks,
>> Chris N8PHU
>> ET1(SW) USN (Ret)
>> Chief transmitter Heavy SES-Americom
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>
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